求教：AMBA3 AXI协议讨论

lu.li · 发表于 2008-7-24 16:35:25

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好像版里关于AXI的讨论已经很久没有了嘛！小弟正在钻研这方面的资料，有一些概念还是不太清楚，比如请问AXI Spec里support for multiple outstanding transactions是什么意思，还有register slice是什么意思呢，希望有同样兴趣的朋友帮忙解答，谢谢拉！

austin_lin · 发表于 2008-7-26 19:16:10

Sorry that I'm not able to respond by Chinese, so here is my answer in English.

Support of multiple outstanding transactions - means that you can issue more than one AXI requests (for example, issuing 4 read transactions) while the previous requested data (such as the data for first read request) is not yet available. This would not be possible under previous AHB (AMBA 2.0) protocol as AHB could only support one outstanding transaction but not more.
Register slice - means that you can insert register at any point of logic path (this could improve the speed of critical path in your design as more registers are inserted between, so less logic level is achieved between two registers) because there is no restricted timing requirement/relationship between AXI different channels.

Cliff_1984 · 发表于 2008-10-7 21:58:05

高手呢？

Cliff_1984 · 发表于 2008-12-17 22:01:20

对于exclusive access操作,要监视一个ADDRESS LOCATION 是监视一个地址,还是以这个地址开始的一个BURST的一段地址呢?

songchao0621 · 发表于 2010-7-19 16:12:48

Sorry that I'm not able to respond by Chinese, so here is my answer in English.

Support of multiple outstanding transactions - means that you can issue more than one AXI requests (for example, i ...
austin_lin 发表于 2008-7-26 19:16

回答的很清楚，谢谢！！